.editor-container, .html-editor {
    position: relative;
    height: 300px;
    margin-bottom: 20px;
    border: 2px solid #d8d8d8;
    box-sizing: content-box;
}

.editor-instance {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.editor-explanation {
    padding-bottom: 5px;
    font-size: 14px;
    color: #666;
}